Bari Osmanov University of Florida

1. Bari Osmanov University of Florida MINERvA: neutrino cross-sections for the future on behalf of MINERvA collaboration EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 1 o f20

2. Outline  Neutrino beam  Neutrino detection  Physics goals  Data analysis  Tracking Prototype  Conclusion EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 2 of 20

3. Main aspects What? MINERvA is a neutrino scattering experiment aimed to provide high-precision cross-sections for present and future neutrino oscillation experiments. It will also study nucleon structure and nuclear effects in neutrino interactions. Why? Precise knowledge of neutrino cross-sections is important in the determination of neutrino beam spectrum and the prediction of the expected spectrum of neutrino events in the far detector in the absence of neutrino oscillations. Where? Fermi National Accelerator Laboratory, high-intensity NuMI neutrino beam EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 3 of 20

4. Neutrino beam  low-energy: - Epeak=3.0 GeV, <E>=10.2 GeV - 60K events per ton per 1020 POT  medium-energy: - Epeak=7.0 GeV, <E>=8.0 GeV - 230K events per ton per 1020 POT  high-energy: - Epeak=12.0 GeV, <E>=14.0 GeV - 525K events per ton per 1020 POT  expect to know the flux to  5 -10% EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 4 of 20

5. Neutrino detection I  A hybrid of fully-active fine-grained tracking detector and traditional calorimeter  Good resolution in measuring momentum, energy and angle of the outgoing particles  Located 100 m underground in the NuMI beamline upstream of MINOS Near Detector EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 5 of 20

6. Neutrino detection II Each module consists of inner (ID) and outer (OD) detector regions. 4 types of modules: Type I: tracker (total of 84 modules): ID – 2 fully active scintillator planes (sequence of XU/XV for 3D tracking) with lead frame along the border for electron calorimetry; OD – 6 outer steel towers with scintillator bars for hadron calorimetry; Type II: ECAL (total of 10 modules): ID – 2 fully active scintillator planes (XU/XV) and 1 lead plane; OD – 6 outer steel towers with scintillator bars for hadron calorimetry; Type III: HCAL (total of 20 modules): ID – 1 fully active scintillator plane and 1 steel plane; OD – 6 outer steel towers with scintillator bars for hadron calorimetry; Type IV: nuclear targets (total of 5 modules): ID – mixed plane from C, Fe, Pb; OD – 6 outer steel towers with scintillator bars for hadron calorimetry; veto wall OD OD ID OD OD OD OD EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 6 of 20

7. Neutrino detection III FEBs signal amplification and digitization Extruded scintillator with WLS fiber (appr.30,000 channels) 2.5 mm position resolution M-64 PMTs LI system (dead channels, PMT gain measurement) Permanent Storage CROC/VME readout DAQ computer EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 7 of 20

8. Nuclear targets  1st study of neutrino nuclear effects  Carbon (0.14 tons), iron (0.69 tons), lead (0.86 tons)-mixed elements in layers to give similar systematics  Will be inserted between the main detector layers (4 tracker modules between the targets)  4He cryogenic target in front of the detector EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 8 of 20

9. Physics goals  Neutrino interaction cross sections  Form factors and structure functions  Nuclear effects EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 9 of 20

10. Cross-section measurements QE Quasi-elastic interaction (we expect over 800K QE events for 16E20 POT) Before MINERvA Total error reduction: 1) QE XS – from 20% down to 5-10% 2) RES - from 40% to 7%(CC)/12%(NC) 3) DIS - from 20% to 5%(CC)/10%(NC) After MINERvA Very important in oscillation experiments for signal/background separation EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 10 of 20

11. Form-factors and structure functions Structure functions:  MinervA can isolate all structure functions  PDFs can then be determined  addition to studies with EM probes QE axial FF:  to measure high-Q2 behavior  improved measurements at low Q2 F2 EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 11 of 20

12. Nuclear effects  nucleon Fermi motion effects and modification of nucleon properties (form-factors) in nuclear medium  FS interactions of the produced hadrons in the nucleus  measured quantities: observed interaction rate, hadron spectrum and multiplicity  For 16E20 POT: - 2M events on Fe and Pb - 1M on C - 500K on He - 9M events in scintillator EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 12 of 20

13. Data analysis Reconstruction points:  takes energy and time of the hit in the scintillator plane as the input parameters  time-slicing – separate events within the spill  pre-clustering – group strips in a plane and calculate X, U, and V coordinate  1-D tracking – chaining clusters in the same view  3-D tracking – associate 1-D projections  track fitting – fit 3-D track (Kalman filter, least squares)  vertex finding – match the tracks  calorimetric reconstruction (uses energy deposition)  track fitting with MINOS  particle ID EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 13 of 20

14. Tracking Prototype (TP) (20% of full detector) Prototype version (24 modules) of the final detector (114 modules) to test the concepts (registration, readout, analysis) Prototype nuclear target (Fe) installed 10'' from the first TP module Cosmic rays, calibration and beam runs EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 14 of 20

15. Tracking Prototype sees first events !!! Quasi – elastic candidate energy of this proton: 200-250 MeV  p tracker ECAL HCAL EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 15 of 20

16. Tracking Prototype sees first events !!! 0 candidate    tracker ECAL HCAL EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 16 of 20

17. Tracking Prototype sees first events !!! DIS candidate tracker ECAL HCAL EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 17 of 20

18. Tracking Prototype sees first events !!! Candidate event from Fe target p  tracker ECAL HCAL EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 18 of 20

19. Conclusion  MINERvA will play an important and potentially decisive role in helping current and future precision oscillation experiments reach their ultimate sensitivity  Nuclear targets will be used to study nuclear effects in neutrino interactions for the first time  Prototype version of the final detector was constructed and operated in NuMI hall  Currently building the remaining modules (plan to complete by mid-February 2010)  Full detector installed mid-March 2010 EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 19 of 20

20. MINERvA collaboration http://minerva.fnal.gov/ - University of Athens, Athens, Greece - Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil - University of California, Irvine, California - University of Dortmund, Dortmund, Germany - Fermi National Accelerator Laboratory, Batavia, Illinois - University of Florida, Gainesville, Florida - Universidad de Guanajuato, Division de Ciencias e Ingenierias, Leon Guanajuato, Mexico - Hampton University, Hampton, Virginia - Institute for Nuclear Research, Moscow, Russia - James Madison University, Harrisonburg, Virginia - Jefferson Lab, Newport News, Virginia - Massachusetts College of Liberal Arts, North Adams, Massachusetts - University of Minnesota-Duluth, Duluth, Minnesota - Northwestern University, Evanston, Illinois - Otterbein College, Westerville, Ohio - Pontificia Universidad Catolica del Peru, Lima, Peru - University of Pittsburgh, Pittsburgh, Pennsylvania - Purdue University-Calumet, Hammond, Indiana - University of Rochester, Rochester, New York - Rutgers University, New Brunswick, New Jersey - University of Texas, Austin, Texas - Tufts University, Medford, Massachusetts - Universidad Nacional de Ingenieria, Lima, Peru - The College of William and Mary, Williamsburg, Virginia Thank you! EPS HEP 2009 16-22 July, Krakow, Poland Bari Osmanov, University of Florida 20 of 20